fcntl.h 10 KB

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  1. /* O_*, F_*, FD_* bit values for the AArch64 Linux ABI.
  2. Copyright (C) 2011-2016 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library. If not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #ifndef _FCNTL_H
  16. # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  17. #endif
  18. #include <sys/types.h>
  19. #ifdef __USE_GNU
  20. # include <bits/uio.h>
  21. #endif
  22. /* open/fcntl. */
  23. #define O_ACCMODE 0003
  24. #define O_RDONLY 00
  25. #define O_WRONLY 01
  26. #define O_RDWR 02
  27. #define O_CREAT 0100 /* Not fcntl. */
  28. #define O_EXCL 0200 /* Not fcntl. */
  29. #define O_NOCTTY 0400 /* Not fcntl. */
  30. #define O_TRUNC 01000 /* Not fcntl. */
  31. #define O_APPEND 02000
  32. #define O_NONBLOCK 04000
  33. #define O_NDELAY O_NONBLOCK
  34. #define O_SYNC 04010000
  35. #define O_FSYNC O_SYNC
  36. #define O_ASYNC 020000
  37. #ifdef __USE_XOPEN2K8
  38. # define O_DIRECTORY 040000
  39. # define O_NOFOLLOW 0100000
  40. # define O_CLOEXEC 02000000
  41. #endif
  42. #ifdef __USE_GNU
  43. # define O_DIRECT 0200000
  44. # define O_NOATIME 01000000
  45. # define O_PATH 010000000
  46. #endif
  47. /* For now Linux has synchronisity options for data and read operations.
  48. We define the symbols here but let them do the same as O_SYNC since
  49. this is a superset. */
  50. #if defined __USE_POSIX199309 || defined __USE_UNIX98
  51. # define O_DSYNC O_SYNC /* Synchronize data. */
  52. # define O_RSYNC O_SYNC /* Synchronize read operations. */
  53. #endif
  54. #ifdef __USE_LARGEFILE64
  55. # define O_LARGEFILE 0
  56. #endif
  57. /* Values for the second argument to `fcntl'. */
  58. #define F_DUPFD 0 /* Duplicate file descriptor. */
  59. #define F_GETFD 1 /* Get file descriptor flags. */
  60. #define F_SETFD 2 /* Set file descriptor flags. */
  61. #define F_GETFL 3 /* Get file status flags. */
  62. #define F_SETFL 4 /* Set file status flags. */
  63. #ifndef __USE_FILE_OFFSET64
  64. # define F_GETLK 5 /* Get record locking info. */
  65. # define F_SETLK 6 /* Set record locking info (non-blocking). */
  66. # define F_SETLKW 7 /* Set record locking info (blocking). */
  67. #else
  68. # define F_GETLK F_GETLK64 /* Get record locking info. */
  69. # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
  70. # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
  71. #endif
  72. #define F_GETLK64 5 /* Get record locking info. */
  73. #define F_SETLK64 6 /* Set record locking info (non-blocking). */
  74. #define F_SETLKW64 7 /* Set record locking info (blocking). */
  75. #if defined __USE_BSD || defined __USE_UNIX98
  76. # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
  77. # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
  78. #endif
  79. #ifdef __USE_GNU
  80. # define F_SETSIG 10 /* Set number of signal to be sent. */
  81. # define F_GETSIG 11 /* Get number of signal to be sent. */
  82. # define F_SETOWN_EX 15 /* Get owner (thread receiving SIGIO). */
  83. # define F_GETOWN_EX 16 /* Set owner (thread receiving SIGIO). */
  84. #endif
  85. #ifdef __USE_GNU
  86. # define F_SETLEASE 1024 /* Set a lease. */
  87. # define F_GETLEASE 1025 /* Enquire what lease is active. */
  88. # define F_NOTIFY 1026 /* Request notifications on a directory. */
  89. # define F_SETPIPE_SZ 1031 /* Set pipe page size array. */
  90. # define F_GETPIPE_SZ 1032 /* Set pipe page size array. */
  91. #endif
  92. #ifdef __USE_XOPEN2K8
  93. # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
  94. close-on-exit set. */
  95. #endif
  96. /* For F_[GET|SET]FD. */
  97. #define FD_CLOEXEC 1 /* Actually anything with low bit set goes */
  98. /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
  99. # define F_RDLCK 0 /* Read lock. */
  100. # define F_WRLCK 1 /* Write lock. */
  101. # define F_UNLCK 2 /* Remove lock. */
  102. /* For old implementation of BSD flock. */
  103. #define F_EXLCK 4 /* or 3 */
  104. #define F_SHLCK 8 /* or 4 */
  105. #ifdef __USE_BSD
  106. /* Operations for BSD flock, also used by the kernel implementation. */
  107. # define LOCK_SH 1 /* Shared lock. */
  108. # define LOCK_EX 2 /* Exclusive lock. */
  109. # define LOCK_NB 4 /* Or'd with one of the above to prevent
  110. blocking. */
  111. # define LOCK_UN 8 /* Remove lock. */
  112. #endif
  113. #ifdef __USE_GNU
  114. # define LOCK_MAND 32 /* This is a mandatory flock: */
  115. # define LOCK_READ 64 /* ... which allows concurrent read operations. */
  116. # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
  117. # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
  118. #endif
  119. #ifdef __USE_GNU
  120. /* Types of directory notifications that may be requested with F_NOTIFY. */
  121. # define DN_ACCESS 0x00000001 /* File accessed. */
  122. # define DN_MODIFY 0x00000002 /* File modified. */
  123. # define DN_CREATE 0x00000004 /* File created. */
  124. # define DN_DELETE 0x00000008 /* File removed. */
  125. # define DN_RENAME 0x00000010 /* File renamed. */
  126. # define DN_ATTRIB 0x00000020 /* File changed attributes. */
  127. # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
  128. #endif
  129. struct flock
  130. {
  131. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  132. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  133. __off_t l_start; /* Offset where the lock begins. */
  134. __off_t l_len; /* Size of the locked area; zero means until EOF. */
  135. __pid_t l_pid; /* Process holding the lock. */
  136. };
  137. #ifdef __USE_LARGEFILE64
  138. struct flock64
  139. {
  140. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  141. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  142. __off64_t l_start; /* Offset where the lock begins. */
  143. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  144. __pid_t l_pid; /* Process holding the lock. */
  145. };
  146. #endif
  147. #ifdef __USE_GNU
  148. /* Owner types. */
  149. enum __pid_type
  150. {
  151. F_OWNER_TID = 0, /* Kernel thread. */
  152. F_OWNER_PID, /* Process. */
  153. F_OWNER_PGRP, /* Process group. */
  154. F_OWNER_GID = F_OWNER_PGRP /* Alternative, obsolete name. */
  155. };
  156. /* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */
  157. struct f_owner_ex
  158. {
  159. enum __pid_type type; /* Owner type of ID. */
  160. __pid_t pid; /* ID of owner. */
  161. };
  162. #endif
  163. /* Define some more compatibility macros to be backward compatible with
  164. BSD systems which did not managed to hide these kernel macros. */
  165. #ifdef __USE_BSD
  166. # define FAPPEND O_APPEND
  167. # define FFSYNC O_FSYNC
  168. # define FASYNC O_ASYNC
  169. # define FNONBLOCK O_NONBLOCK
  170. # define FNDELAY O_NDELAY
  171. #endif /* Use BSD. */
  172. /* Advise to `posix_fadvise'. */
  173. #ifdef __USE_XOPEN2K
  174. # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
  175. # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
  176. # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
  177. # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
  178. # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
  179. # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
  180. #endif
  181. #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
  182. /* Flags for SYNC_FILE_RANGE. */
  183. # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
  184. in the range before performing the
  185. write. */
  186. # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
  187. dirty pages in the range which are
  188. not presently under writeback. */
  189. # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
  190. the range after performing the
  191. write. */
  192. /* Flags for SPLICE and VMSPLICE. */
  193. # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
  194. # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
  195. (but we may still block on the fd
  196. we splice from/to). */
  197. # define SPLICE_F_MORE 4 /* Expect more data. */
  198. # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
  199. /* Flags for fallocate. */
  200. # define FALLOC_FL_KEEP_SIZE 1 /* Don't extend size of file
  201. even if offset + len is
  202. greater than file size. */
  203. # define FALLOC_FL_PUNCH_HOLE 2 /* Create a hole in the file. */
  204. # define FALLOC_FL_COLLAPSE_RANGE 8 /* Remove a range of a file
  205. without leaving a
  206. hole. */
  207. # define FALLOC_FL_ZERO_RANGE 16 /* Convert a range of a
  208. file to zeros. */
  209. /* Maximum handle size (for now). */
  210. # define MAX_HANDLE_SZ 128
  211. #endif
  212. __BEGIN_DECLS
  213. #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
  214. /* Provide kernel hint to read ahead. */
  215. extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
  216. __THROW;
  217. /* Selective file content synch'ing.
  218. This function is a possible cancellation point and therefore not
  219. marked with __THROW. */
  220. extern int sync_file_range (int __fd, __off64_t __offset, __off64_t __count,
  221. unsigned int __flags);
  222. /* Splice address range into a pipe.
  223. This function is a possible cancellation point and therefore not
  224. marked with __THROW. */
  225. extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
  226. size_t __count, unsigned int __flags);
  227. /* Splice two files together.
  228. This function is a possible cancellation point and therefore not
  229. marked with __THROW. */
  230. extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
  231. __off64_t *__offout, size_t __len,
  232. unsigned int __flags);
  233. /* In-kernel implementation of tee for pipe buffers.
  234. This function is a possible cancellation point and therefore not
  235. marked with __THROW. */
  236. extern ssize_t tee (int __fdin, int __fdout, size_t __len,
  237. unsigned int __flags);
  238. /* Reserve storage for the data of the file associated with FD.
  239. This function is a possible cancellation point and therefore not
  240. marked with __THROW. */
  241. # ifndef __USE_FILE_OFFSET64
  242. extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len);
  243. # else
  244. # ifdef __REDIRECT
  245. extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset,
  246. __off64_t __len),
  247. fallocate64);
  248. # else
  249. # define fallocate fallocate64
  250. # endif
  251. # endif
  252. # ifdef __USE_LARGEFILE64
  253. extern int fallocate64 (int __fd, int __mode, __off64_t __offset,
  254. __off64_t __len);
  255. # endif
  256. #endif /* use GNU */
  257. __END_DECLS